- 您现在的位置：买卖IC网 > Sheet目录1194 > ADT7476EBZEVB (ON Semiconductor)BOARD EVALUATION FOR ADT7476
ADT7476
Table 69. PWM MINIMUM DUTY CYCLE REGISTERS (Note 1)
Register Address
0x64
0x65
0x66
R/W
R/W
R/W
R/W
Description
PWM1 Minimum Duty Cycle
PWM2 Minimum Duty Cycle
PWM3 Minimum Duty Cycle
Power-On Default
0x80 (50% Duty Cycle)
0x80 (50% Duty Cycle)
0x80 (50% Duty Cycle)
Bit No.
[7:0]
Name
PWM Duty
Cycle
R/W
R/W
Description
These bits define the PWM MIN duty cycle for PWMx.
0x00 = 0% Duty Cycle (Fan Off)
0x40 = 25% Duty Cycle
0x80 = 50% Duty Cycle
0xFF = 100% Duty Cycle (Fan Full Speed)
1. These registers become read-only when the ADT7476 is in automatic fan control mode.
Table 70. T MIN REGISTERS (Note 1 and 2)
Register Address
0x67
0x68
0x69
R/W
R/W
R/W
R/W
Description
Remote 1 Temperature T MIN
Local Temperature T MIN
Remote 2 Temperature T MIN
Power-On Default
0x5A (90 ° C)
0x5A (90 ° C)
0x5A (90 ° C)
1. These are the T MIN registers for each temperature channel. When the temperature measured exceeds T MIN , the appropriate fan runs at
minimum speed and increases with temperature according to T RANGE .
2. These registers become read-only when the Configuration Register 1 Lock bit is set. Any further attempts to write to these registers have no
effect.
Table 71. THERM LIMIT REGISTERS (Note 1 and 2)
Register Address
0x6A
0x6B
0x6C
R/W
R/W
R/W
R/W
Description
Remote 1 THERM Temperature Limit
Local THERM Temperature Limit
Remote 2 THERM Temperature Limit
Power-On Default
0x64 (100 ° C)
0x64 (100 ° C)
0x64 (100 ° C)
1. If any temperature measured exceeds its THERM limit, all PWM outputs drive their fans at 100% duty cycle. This is a fail-safe mechanism
incorporated to cool the system in the event of a critical overtemperature. It also ensures some level of cooling in the event that software
or hardware locks up. If set to 0x80, this feature is disabled. The PWM output remains at 100% until the temperature drops below
THERM limit ? hysteresis. If the THERM pin is programmed as an output, exceeding these limits by 0.25 ° C can cause the THERM pin to
assert low as an output.
2. These registers become read-only when the Configuration Register 1 Lock bit is set to 1. Any further attempts to write to these registers have
no effect.
Table 72. TEMPERATURE/T MIN HYSTERESIS REGISTERS (Note 1 and 2)
Register Address
0x6D
[3:0]
[7:4]
0x6E
0x6E
R/W
R/W
HYSL
HYSR1
R/W
HYSR2
Description
Remote 1 and local temperature hysteresis.
Local temperature hysteresis. 0 ° C to 15 ° C of hysteresis can be
applied to the local temperature AFC control loops.
Remote 1 temperature hysteresis. 0 ° C to 15 ° C of hysteresis can
be applied to the Remote 1 temperature AFC control loops.
Remote 2 temperature hysteresis.
Local temperature hysteresis. 0 ° C to 15 ° C of hysteresis can be
applied to the local temperature AFC control loops.
Power-On Default
0x44
0x40
1. Each 4-bit value controls the amount of temperature hysteresis applied to a particular temperature channel. Once the temperature for that
channel falls below its T MIN value, the fan remains running at PWM MIN duty cycle until the temperature = T MIN – hysteresis. Up to 15 ° C of
hysteresis can be assigned to any temperature channel. The hysteresis value chosen also applies to that temperature channel if its THERM
limit is exceeded. The PWM output being controlled goes to 100% if the THERM limit is exceeded and remains at 100% until the temperature
drops below THERM – hysteresis. For acoustic reasons, it is recommended that the hysteresis value not be programmed less than 4 ° C.
Setting the hysteresis value lower than 4 ° C causes the fan to switch on and off regularly when the temperature is close to T MIN .
2. These registers become read-only when the Configuration Register 1 Lock bit is set to 1. Any further attempts to write to these registers have
no effect.
http://onsemi.com
58
发布紧急采购，3分钟左右您将得到回复。
相关PDF资料
ADT7490ZEVB
BOARD EVALUATION FOR ADT7490
ADZS-21262-1-EZEXT
BOARD DAUGHTER FOR ADSP-21262
ADZS-BF-EZEXT-1
BOARD DAUGHTER ADSP-BF533/561KIT
ADZS-BFAV-EZEXT
BOARD DAUGHT ADSP-BF533,37,61KIT
ADZS-BFSHUSB-EZEXT
BOARD DAUGHTER EZ EXTENDER
ADZS-BRKOUT-EX3
ADZS-BRKOUT-EX3
ADZS-SHAUDIO-EZEXT
SHARC AUDIO EZ-EXTENDER
ADZS-WVGALCD-EX3
BOARD EXTENDER WVGA/LCD EI3
相关代理商/技术参数
ADT7481
制造商:AD 制造商全称:Analog Devices 功能描述:Dual Channel Temperature Sensor and Over Temperature Alarm
ADT7481ARMZ
功能描述:板上安装温度传感器 2 CH TEMP SNSR/ALARM 2 WIRE SMBUS INTRFCE RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor
ADT7481ARMZ-001
功能描述:板上安装温度传感器 2 CH TEMP SNSR/ALARM 2 WIRE SMBUS INTRFCE RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor
ADT7481ARMZ-1
功能描述:IC SENSOR TEMP 2CH ALARM 10MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 热管理 系列:- 标准包装:1 系列:- 功能:温度监控系统（传感器） 传感器类型:内部和外部 感应温度:-40°C ~ 125°C，外部传感器 精确度:±2.5°C 本地（最大值），±5°C 远程（最大值） 拓扑:ADC，比较器，寄存器库 输出类型:2 线 SMBus? 输出警报:无 输出风扇:无 电源电压:2.7 V ~ 5.5 V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:SOT-23-8 供应商设备封装:SOT-23-8 包装:Digi-Reel® 其它名称:296-22675-6
ADT7481ARMZ-1R7
功能描述:板上安装温度传感器 2 CH TEMP SNSR/ALARM 2 WIRE SMBUS INTRFCE RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor
ADT7481ARMZ-1REEL
制造商:Rochester Electronics LLC 功能描述: 制造商:Analog Devices 功能描述:
ADT7481ARMZ-1REEL7
制造商:AD 制造商全称:Analog Devices 功能描述:Dual Channel Temperature Sensor and Over Temperature Alarm
ADT7481ARMZ-1RL
功能描述:板上安装温度传感器 2 CH TEMP SNSR/ALARM 2 WIRE SMBUS INTRFCE RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor